Method for refining non-ferrous metal
OwnerAdrian Deneys, Eric Mackenzie +5inventors
InventorsAdrian Deneys, Eric Mackenzie, William Mahoney, Jin Liu, Anthony Edward Warner, David Hall, David Mallette
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Abstract
A method for refining non-ferrous metal wherein a stream of oxygen containing gas is provided from a lance into the headspace of a refining vessel for passage to the molten metal bath within the refining vessel, and a flame envelope is provided around and along the oxygen containing gas stream for a portion of its length, wherein the flame envelope simultaneously serves to keep accretions from forming on the lance face and serves to maintain the oxygen-containing gas stream coherent.
Claims10
A method for refining non-ferrous metal comprising:
- (A) providing a refining vessel containing a bath of non-ferrous metal and having a headspace above the bath of non-ferrous metal;
- (B) passing a stream of oxygen containing gas from a lance at a velocity of not more than 3 Mach into the headspace, and passing the oxygen containing gas stream through the headspace from the lance to the non-ferrous metal bath;
- (C) providing a flame envelope around the oxygen containing gas stream for a portion of the distance from the lance to the bath;
- and
- (D) reacting oxygen from the oxygen containing gas stream with material in the bath to oxidize said material.
Dependencies are inferred from the claim text.